Construction of rotary blowers and pumps.



A. E. CLIFTON.

CONSTRUCTION OF ROTARY BLOWEBS AND PUMPS.

APPLIOATION FILED JAN. 19. 1911.

Patented Mar. 26, 1912.

UNITED STATES-PATENT OFFICE.

anal-inn n. CLIFTON,oFcQNNERSVILLE, INDIANA.

. CONSTRUCTION DIE-ROTARY FLOWERS AND PUMPS.

Specification of Letters Patent. Application tiled January 19, 1911. Serial No. 603,434.

Patented Mar. 26, 1912.

To all whom it may concern.

Be it known that .I, ARCHER E. Cmr'roiy, a citizen of the United States, and .a resident of Connersville, Fayette county, State of Indiana, have invented certain new and useful Improvements 1n the Construction of Rotary Blowers and Pumps, and I do declare the followin tobe a clear, full, and exact. description o the invention, attention being called to the drawing which accompanies this application and forms a part thereof. i

'. This invention relates to improvements in the construction of a certain type of blowers or pumps and in which 'two rotary members, known jas impellers,- co-act by their.

complementary simultaneous actuation, to

move the matter, liquid, gas, air, etc, which is to be handled.

Much machine-tool work is in" the building'of these pumps and the leading object Qfmy-inVention-istO Construct thle'm in' a manner whereby this work is reduced by the annular side 9 and the parallel sides and simplified so as to simplify the construction and to reduce the manufacturing cost accordingly. 7

Another object is to arrange the construction in a manner permitting ready access to the various parts without making it necessary to dismantle the entire pump. y In the following specification and particularly pointed out in the claim at the end thereof, willbe found afull'description of 'my invention, together with its parts and construction, which latter is also illustrated in the accompanying drawing, in which Figure 1, shows, a top-view of such' a ump, parts being removed land others roken away, showing substantially a topview, of the bed-frame of the device. Fig. 2, is a vertical longitudinal section of this bedframe. Fig. 3, IS a cross-section of the complete device on line 3-3 of Fig. 1. Fig. 4;,

shows portions of Fi 3, atenlarged scale. Fig. 5, shows parts 0 Fig. 4, in a sect-ion at right angles to said figure. Fi .6, shows parts of Fig. 3, as they appear w en viewed externally and at enlarged scale, it being substantially a front-view of the stufiingbox used. Fig. 7, shows these parts in a central longitudinal section and as they a pear when viewed in a plane at right ang es to n the drawing, A indicates the workin chamber of the ump, formed and .inclose the other for an outlet. In connection with opening'12, there is a boss or nipple to per..

mit pipe-connection. When liquid is handied, the lower openingmay be used as an 10,10. openings 11 and 12 are proyided in annular wall 9-, one serving as'an inlet and inlet, in which case a receiving, chamber B is provided below it, of which 13 is the bot tom. Two of the sides of this chamber are formed by parts 14, 14 of the sides of bedframe 0.

. 15, 15, indicate the other two sides, the r f chamber. y I

wo inlet-openings 16, 16, with pipe attaching nipples are provided to permit ata supply-pipe on either side,-'

tachment' 0 being below the parallel sides of the workthe non-used opening being closed by a plug Provision, similarly arranged; mayalso be made .for intake through the bot,-

tom.

The substance handled is inoved by two:

impellers D fi tted to operate within chamber A andfin conjunction with the sides thereof and'hyith each other. They are mounted. on shafts 18*and rotate in opposite directions so as to co-act with each other and,

with the chamber-wall in a manner to draw matter in through the inlet and moving it toward the outlet where it is expelled. One' The shafts are supported in boxes F,

there being three to each shaft. one at or near each end of each and one between the impellers and the gear-wheels. The lower part of lot each box consists of two divided parts 22 '7 to admit an oiling ring 23 which hangs on the shaft and depends into an oil chamber G, formed below each box, .Z-ft being the lot sides of these chambers; A cap 15 is pro-j vided forjthe two parts of each box.

Stuffing boxes H are provided where the shafts pass through sides 10 of chambers .A and recesses ,J are formed below them in the bed-frame and of which 25 are the sides.

In most of these pumps as heretofore con structed, chamber A was divided at, and in line with theparallel sides 10, which sides were in form of detachable heads.

. They could not be removed however if acmeans like screws and bolts.

cess was desired to the interior of chamber A for instance, unless the shafts were first removed, which required opening of boxes F, and amounted practically to a complete dismantling of the entire pump. To obviate this,'I divide all'non-movable parts of the pump on a plane passing through the axis of each of the two shafts, so that all parts located on one side of this plane may be removed withoutrequiring disturbance d sults containing-one half of annular side 9 and one half of each of the parallel sides 10. A flange 26 is provided on this removable half which permits attachment of it toits complementa half.

Gear-chamber E 15 divided in a similar manner which results in a removable upper half a which is provided with-flanges 27, permitting attachment to the lower half. The halves of chamber A and chamber E below the shafts, form integral parts of bedframe 0, as do sides 24 of oil-chambers G, the sides 25 of recesses J and the lower half of all shaft boxes. As a result the lower ones of the two superposed opposite surfaces of a joint are all in one plane, which plane is substantially the upper surface a of bed frame C. The effect of this construction is of far-reaching advantage inasmuch as it permits the planing of all of these surfaces at one time and in one operation so that absolute true alinement is assured.

The extent of surfaces to be planed may be reduced by having those portions of surface 0 upon which the attaching flanges of parts a and e, as well as those of the caps of the boxes are seated, slightly higher than the remaining parts of surface 0.

lVlachine-tool work on the interior surfaces of the walls of chamber A and on the op posite surface of impellers D is made unnccessanv by providing alining, respectively coating for these surfaces, of a metal which casts" with little shrinkage and leaves a smooth-surface. White metal or a similar metal or alloy which by preference is also non-corrosive, is suitable for this purpose.

. It may be mentioned here that the softness of such a metal is not objectionable for use in this connection inasmuch as no actual rubbing contact takes place between the operating parts of these pumps. 28 indicates the lining of chamber A and 29 indicates the coating of the impellers, the added metal being held in place in each case by an interlocking joint, formed as plainly indicated in the drawing, Figs. 4 and 5.- a

The procedure in case of forming lining 28 is as follows: When bed-frame G is cast, a core is used which produces the desired shape and dimensions for the cast-iron portion and also forms recesses 31 or complementary projections. Afterthat a core of reduced size is used within this casting, leaving aspace to receive the metal for the lining. This metal enters recesses 31 and becomes securely connected. The procedure, in case of upper part a is the same.

Each core has prints, or extensions equivalent to the shafts, so as to permit true centering and perfect alinement. These prints may extend into all the boxes, so.

that the Babbitt metal forming the shaftbearings may also be poured at the time. The procedure for coating the impellers 1s analogous, except that two .moldsareused. 4

The interior of the gear-chamber requires no coating.

The stuffing boxes must be constructed in a accordance with the general plan and requires a divisible gland, whiclris accordingly formed in two halves as shown at 32.

A yoke K is provided which straddles the shaft and engages with its bifurcated parts the two gland sections. It is loosely held in position by a screw 33and in a manner permitting-,it to adjust itself to the gland. A nut 34.- carl'ied on a screw 35 is used to adjust the yoke to cause the gland to follow up the packing.

As will he seen the fact that the jointforming surfaces are alined in one plane facilitates not only the construction, but permits quick work in erecting and insures correct positions.

Correctly shaped molds, cores and formers being once provided, the peculiar shape of the impeller is obtained quickly and with reliable accuracy without requiring slow and tedious machine-tool work.

- The fact that the opposite surfaces of the.

uorking parts are formed of non-corrosive metal prevents these parts from sticking, due to rust formed during non-use.

Access for cleaning and inspection may be quickly had without dismantling the pump.

The work ng surfaces, if defective from wear or otherwise, ma v be quickly and inexpensively renewed )y melting out the metal and by re-casting new linings and coatings.

llaving described my invention, I claim as new:

In the construction of rotary pumps, the combination of parallel shafts, interacting impellers and iutermeshing gears mounted on them for simultaneous rotation, an inclosure for the impellers, an inclosure for the gears, bearings for the shafts one for each of them located between impellers and gears and one at each end of each shaft, so that each shaft is supported on each side ol' the gears, oil-chambers provided one below each hearing, and a bed-frame containing integrally formed in it the lower half of the inclosure for the impellers and of the inclosure for the gear-chamber, also the lower half of all the shaft-bearings and the oilchambers connected therewith whereby perfect parallelism of the shafts and alinement of their hearings is obtained. by a rigid, onepieoe supporting structure.

In testimony whereof, I hereunto aflix my signature in the presence of two witnesses.

ARCHER E. CLIFTON.

\Vitnesses L. L. Bnoonn'us, E. E. MOORE. 

